题目内容：

短文改错

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号(∧)，并在其下面写出该加的词。

删除：把多余的词用斜线(\)划掉。

修改：在错的词下画一横线，并在该词下面写出修改后的词。

注意：1.每处错误及其修改均仅限一词。

2．只允许修改10处，多者(从第11处起)不计分。

Yesterday, as I was queuing at the checkout at a store, there was an old lady in the front of me in line. She seemed very confusing when the cashier asked her pay US$38. She had about US$5 in her wallet. The cashier told her that she could not buy the items because she didn't have enough money. So, I told the cashier I would pay for that she bought. Afterwards, I paid for all the items. When I got outside, the lady was standing there. While I was talking about her, her daughter appeared. She told me that her mother had Alzheimer's disease. Then she noticed that her mother had three bag of groceries and wondered how she managed to pay for them with enough money. I told her that I had paid for it. The daughter wanted to pay me back, so I refused. I believe make others feel good makes me feel good.